A Simple Heat Exchanger for Use during Blood Transfusion.

CONSIDERABLE INTEREST has recently been prod to the blood during masswe transfusmn Boyan and Howland of cold bank blood rote an antecubltal veto may produ~ true behind the heart as low as ~7 5 o C The advent c rote the right atrmm has been held responsible foJ anhythmms, particularly ventncular fibrillation dun of blood mtra-operalavely There is no doubt that du human arm acts as an adequate heat exchanger Durn ment ~t would seem logical to supplement tins heat donor blood prior to, or dining, transfusaon The prac 5{~ ml umt of bank blood m a water bath at body Such a procedure reqmres a considerable amount of t reqmrements must be antaclpated Boyan and Howlm heat exchanger utlhzmg a coal of plasttc intravenous bath Dunng transfusion blood circulates through tll e~rcuat between the blood container and the patient least one commercml blood warmer utahzmg th~ pr~ expenswe piece of eqmpment partzcularly when one blood rep|aeement, two transfusmns may be proceedm the purchase of two urnts It was decided to produc~ m the hospital workshop using readdy avadable mate possable Since zt as maportant to rnamtam the tempera to the body temperature, it was also decided to mc controlled heating system rote the umt external warming of bank clama that a rapid mflasion ,e an oesophageal temperaf thas extremely cold blood the incidence of cardmc ng the rapid replacement nng infusions of blood the ag ingh-flow blood replaceexchange by warrnmg the tlce of nnmersmg an entire temperature as mapractacal imae and the patient's blood ld have described a smaple tubing located m a water [s umt, winch as placed !m There as now aw~!ablelat aelple However, thl~ as an considers that m massive g smaultaneously, requtring a suatable heat exchanger lal and as economacally as rare .of the water bath close ~rporate a thermostataeally